A.O. Smith BTX-80 SERIES 100 Blower Assembly Installation, Installation of Vent System

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The condensate trap may be primed by filling the CONDENSATE U-ASSEMBLY with tap water while the water heater is not operating. The system is fully primed when the water level reaches the adaptor connected into the Tee. In most installations the water heater will self-prime the condensate trap during the first full heat-up cycle. If a sound of air bubbling through water (gurgling) is heard while the blower is operating after the first heat-up cycle, then turn the unit off and contact your plumber or service representative.

If these instructions are not followed, the condensate build-up will block the exhaust outlet, which will cause improper operation.

Do NOT block or plug any hole in this hex plug.

DRAIN LINE

CONDENSATE

U-ASSEMBLY,

AKA. VENT PIPE

ASSEMBLY #1

APPROXIMATELY

0.25" (6.35 mm)

*NO PORTION OF THE FIELD SUPPLIED DRAIN LINE BEYOND THE 1/2" ADAPTOR MAY BE ELEVATED HIGHER THAN THE ADAPTOR. THIS MUST BE TRUE FOR THE ENTIRE LENGTH OF DRAIN LINE INCLUDING EXIT INTO AN APPROPRIATE DRAIN.

FIGURE 16.

Condensate is likely to form in the venting system attached to this water heater. The vent pipe should be sloped downward away from the blower assembly (not less than 1/8” (3.2 mm) nor greater than 1/2” (12.7 mm) per foot (30 cm) maximum). If the vent piping is vented level or sloped upwards away from the blower assembly, then adequate means for draining and disposing of the condensate needs to be made by the installer. Two 3/8” condensate hoses should be connected to the built in drain ports of blower outlet adaptor. If a VAA is installed, a 3/8” condensate hose should be connected to the barb fitting on it; otherwise the unused barb fitting on vent pipe assembly #2 should be plugged with one of the break-away plugs. See Figure 17.

Condensate neutralizer kits are available. Contact your distributor or Service Agency.

BLOWER ASSEMBLY INSTALLATION

1.This power vented water heater comes with blower assembly installed.

2.After unit is set in place, make sure blower assembly is still mounted securely.Also make sure both drain ports of rubber boot vent adapter are capped off. Lastly, make sure there is no damage to blower.

3.Condensate drains from three locations on blower assembly. See

Figure 17. One flexible hose runs from bottom of blower housing; two run from the ports of rubber connector at the outlet of blower.

All these three condensate hoses are connected to barb fittings at vent pipe assembly #2. The hose from bottom of blower housing is clamped by two clamps and the two hoses from rubber connector are harnessed by another clamp. Make sure there is no kink or twist.

FIGURE 17.

4.Make sure there is no packing material in the inlet or discharge of the blower.

5.Make sure that the plastic tubing is still attached from the air pressure switch to the port on the blower housing. Make sure the plastic tubing is not folded anywhere between the pressure switch and the blower housing.

6.Make sure the ON/OFF switch is in the OFF position and that the outer harness is connected from the blower control box to the connector on the bottom side of the gas valve.

7.If the outer harness is not factory installed, make sure the ON/ OFF switch is in the OFF position and then connect the outer harness from the blower control box to the connector on the bottom side of the gas valve.

8.Do not plug in power cord until vent system is completely installed. The Power Vent operates on 110-120 Vac. therefore a grounded outlet must be within reach of the 6 foot (1.8 m) flexible power cord supplied with the vent (See Figure 1). The power cord supplied may be used on a unit only where local codes permit. If local codes do not permit use of flexible power supply cord:

A.Make sure the unit is unplugged from the wall outlet. Remove the plastic top cap. Remove screws and open panel on the front of the control box on the blower.

B.Cut the flexible power cord, leaving enough to be able to make connections. Remove the strain relief fitting from the box.

C.Install a suitable conduit fitting inside the enclosure.

D.Splice field wiring into existing wiring using code authorized method (wire nuts, etc).

E.Be certain that neutral and line connections are not reversed when making these connections.

F.Ground heater properly. This water heater must be grounded in accordance with the National Electrical Code NFPA 70 or the Canadian Electrical Code C22.1 and/or local codes. These must be followed in all cases.

The water heater must be connected to a grounded metal, permanent wiring system; or an equipment grounding conductor must be run with the circuit conductors and connected to the equipment grounding terminal or lead on the water heater, see Figure 19.

G.Close the panel on the control box. Make sure that the access panel is secured shut.

9.The blower discharge boot is made to accept only straight sections of 2” pipe. To start off with an elbow, a short section of the furnished pipe, a minimum of 2 inches (5.1 cm), must be cut and glued into the end of the elbow that will mount on the discharge boot.

INSTALLATION OF VENT SYSTEM

Before beginning installation of piping system thoroughly read the section of this manual VENT PIPE PREPARATION.

If you are installing your system so that it vents through roof, please refer to section titled INSTALLATION OF VERTICAL VENT SYSTEM.

VENT TERMINAL INSTALLATION, SIDEWALL

1.Install the vent terminal by using the cover plate as a template to mark the hole for the vent pipe to pass through the wall. BEWARE OF CONCEALED WIRING AND PIPING INSIDE THE WALL.

2.If the Vent Terminal is being installed on outside of a finished wall, it

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Contents Printed Power Vented GAS Models W/HOT Surface IgnitionWhenever maintenance adjustment or service is required 197086-004Approvals Safe INSTALLATION, USE and ServiceImportant Definitions General Safety Information General Safety Information Table of Contents IntroductionSignage Installation of Carbon Monoxide DetectorsApproved Carbon Monoxide Detectors ExemptionsReplacement Parts and Deliming Products Typical InstallationElbow Access Door Condensate Hose and Drain PAN Mixing Valves Capacity and Gas and Electrical Characteristics ROUGH-IN-DIMENSIONSRough-In-Dimensions Recovery capacity based on 90% thermal efficiencyLocating the NEW Water Heater Facts to Consider About the LocationInsulation Blankets Air REQUIREMENTsFresh Air Openings For Confined Spaces Unconfined SpaceConfined Space Outdoor Air Through Two OpeningsOutdoor AIR Through TWO Vertical Ducts Outdoor AIR Through TWO Horizontal DuctsAIR from Other Indoor Spaces Water Piping Installing the NEW Water HeaterChemical Vapor Corrosion Space Heating and Potable Water SystemThermal Expansion Temperature-Pressure Relief ValveValve and Pipe Insulation if supplied Contact qualified installer or service agency High Altitude InstallationGas Piping Filling the Water Heater Sediment TrapsPer square inch 3.5 kPa Vent Pipe Assembly VentingTermination Clearances Sidewall Power Vent Vent Pipe TerminationCondensate Planning the Vent SystemBreathing Hazard Carbon Monoxide Gas Installation of Vent System Blower Assembly InstallationVent Terminal INSTALLATION, Sidewall Than the marked circle Power Vent Wiring Schematic FigureChisel an opening approximately one half inch 1.3 cm larger Pointed in the correct position, see FigureInstallation of Vent SYSTEM, Sidewall Installation of Vertical Vent SystemVent attenuation assembly Flexible tubing Instruction sheet Vent Attenuation Assembly InstallationVertical VAA Installations Recommended Inch vent Vertical VAA Installations Vent Pipe Preparation Recommended BRUSH* Size for Primer Cement ApplicationsStep F Step BStep E Step GWhat to do if YOU Smell GAS Power Before ServicingDo not try to light the burner by hand Do not TRY to Light the Burner by HandDisplay Temperature RegulationTemperature Indicators Temperature Adjustment Buttons D E FStart UP Conditions For Your InformationOperational Conditions Periodic Maintenance Anode ROD InspectionTo Flush the Water Heater Storage Tank Temperature-Pressure Relief Valve TestKeep hands clear of drain Open the water heater drain valve to flush the storage tankService Leakage CheckpointsTroubleshooting Guidelines Trouble ShootingAssembly if damaged or defective Ensure the flame sensor is clean use ultra fine steelTurn off power to the water heater Unplug ignitor assembly plug from control. Check resistanceAssembly .2 If the reading taken is less than 100,000 Unplug the ignitor assembly plug from the control. CheckResistance of the black resistor wire between pins Check vent temperature limit switch if it is determinedTroubleshooting Guidelines Tank Service and Repair ExpensesClaim Procedure ALL Other Parts

BTX-80 SERIES 100 specifications

The A.O. Smith BTX-80 Series 100 is a cutting-edge heating solution designed for effective and efficient water heating. This model is particularly well-suited for residential applications, offering an impressive balance of performance and energy efficiency.

One of the standout features of the BTX-80 Series 100 is its innovative design, which incorporates a high-efficiency condensing technology. This allows the unit to capture and utilize heat that would otherwise be lost in traditional systems, thereby maximizing energy usage and reducing overall operating costs. With an impressive energy factor (EF) rating, this water heater contributes to lower utility bills while promoting environmental sustainability.

The BTX-80 is equipped with a powerful 80-gallon tank, providing ample hot water for households of varying sizes. Its large capacity ensures that multiple appliances can operate simultaneously without running out of hot water, making it an ideal choice for families with high demand. The model also incorporates a robust heating element that ensures rapid recovery and maintains consistent water temperatures.

Safety and convenience are paramount in the design of the BTX-80. It features a comprehensive digital control system that allows users to set precision temperature settings according to their needs. The intuitive interface simplifies adjustments and monitoring, while safety mechanisms like temperature and pressure relief valves provide peace of mind during operation.

A.O. Smith has also prioritized quality and durability in the construction of the BTX-80 Series 100. The tank is made from high-quality materials and comes with a robust enamel coating that resists corrosion and extends its lifespan. Additionally, the unit is backed by a lengthy warranty, reflecting the manufacturer's confidence in its longevity.

Installation and maintenance are straightforward with the BTX-80, as it is designed to fit seamlessly into existing plumbing configurations. Furthermore, the unit operates quietly, ensuring minimal disruption in the home environment.

In conclusion, the A.O. Smith BTX-80 Series 100 stands out in the market as a reliable, energy-efficient, and user-friendly water heating solution. With its advanced technologies and emphasis on safety and durability, it proves to be a smart investment for any household looking to improve their hot water system.
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